JPH10269666A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk reproducing device light in weight, small in size and low in cost by eliminating a dedicated driving power source used for a tray locking mechanism. SOLUTION: In this disk reproducing device, the position of a light beam of an optical pickup 7 is moved to the prescribed position at the outer peripheral side of the recording area of the disk, and the lock of the tray 21 is released by rotationally operating a lock lever 11 through an eject protrusion 9 attached to this optical pickup 7, that is, the device is constituted so as to release the lock of the tray 21 by using the driving power of a pickup feeding motor 8. Thus, the requirement to separately arrange the driving power source for releasing the tray lock is eliminated, then the whole device can be made small in size, light in weight and reduced in power consumption and cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-ROM,
The present invention relates to a disk reproducing device for reproducing an optical disk such as a VD or a disk device capable of performing recording.

[0002]

2. Description of the Related Art A disk drive such as a CD-ROM drive or a DVD-ROM drive with a built-in computer includes a unit having a built-in disk drive / playback mechanism such as an optical pickup, a disk motor, and a turntable.
Currently, the mainstream type is a type in which a tray on which an optical disk is mounted is loaded / unloaded along the direction of the disk surface (loading / unloading).

FIG. 8 schematically shows the entire structure of a disk reproducing apparatus having such a structure.

In FIG. 1, reference numeral 81 denotes a disk drive cabinet, and reference numeral 82 denotes a mechanical unit housed in the cabinet 81. The mechanical unit 82 is provided with a mechanical base 84 that tilts around a fulcrum 83 within a certain angle range. The mechanical base 84 is moved between an inclined posture shown in FIG. 8A and a horizontal posture (disc clamp state) shown in FIG. 8B by raising and lowering a pin 85 protruding from the fulcrum side. The state is switched with. Sub chassis 84
Above, a disk motor 88 directly connected to a turntable 87, an optical pickup 89, and a pickup chassis 90 mounted with a pickup drive mechanism are supported via a buffer member 91 such as a damper rubber.

Further, a clamper 92 is attached to the mechanical unit 82 via a clamper holding plate 93 for holding the disk D while being attracted to the turntable 87 by magnetic force. The clamper holding plate 93 is provided with a hole for mounting a clamper, and the clamper 92 is fitted into the hole so as to be vertically movable within a certain distance. Reference numeral 94 denotes a tray on which the disk D is mounted. The tray 94 is configured freely with respect to the unit 81. When the tray 94 is being discharged, FIG.
As shown in (a), the sub-chassis 84 takes an inclined posture, and the approach path of the tray 94 is opened. When the tray 94 is inserted into the unit 81, the sub-chassis 84 rotates in the direction of arrow C about the fulcrum 83, and as a result, FIG.
As shown in (b), the disk D stored in the tray 94 is lifted from below by the turntable 87,
Further, it is sandwiched by the magnetic attraction force with the clamper 92, and the disk drive / reproduction becomes possible.

Incidentally, in such a disk drive, means for locking the tray inserted into the cabinet 81 at a fixed position is indispensable, whereby the tray 94 is fixed by an external shock or internal vibration. This suppresses the occurrence of such a problem that the disc is displaced from the position toward the disc surface and the disc cannot be placed on the tray 94 in a correct posture when the disc clamp is released. As such a tray locking means, a means for inserting and removing a lock pin 102 into and from a lock hole 101 provided in the tray is known, and when the lock of the tray 94 is released, the tray 9 is unlocked.
4 is discharged from the cabinet 81 by the power of a motor or the force of a biasing member such as a spring.

[0007]

However, in such a tray lock mechanism, a power source 103 such as a plunger or a motor for driving the lock pin 102 up and down to perform a lock / unlock operation of the tray is separately provided. This necessitates an increase in the number of parts and cost, which hinders the weight and size of the entire apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and provides a disk reproducing apparatus which can realize a light weight, a small size, and a low cost by eliminating a dedicated power source of a tray lock mechanism. The purpose is.

It is another object of the present invention to provide a highly reliable disk reproducing apparatus which does not release the locked state of the tray due to an external impact or the like.

Another object of the present invention is to provide a disk reproducing apparatus capable of stabilizing a meshing state between a gear connected to a motor and a rack fixed to an optical pickup in a pickup feeding mechanism.

[0011]

According to a first aspect of the present invention, there is provided a disk reproducing apparatus, comprising: a tray on which a disk is mounted and which can be taken in and out of a unit; It is characterized by comprising a pickup feeding mechanism for transporting the pickup, a lock means for locking the tray in the unit, and means for unlocking the locking means by the power of the pickup feeding mechanism.

According to a second aspect of the present invention, there is provided a disk reproducing apparatus comprising: a tray on which a disk is mounted and which can be taken in and out of the unit; a pickup feeding mechanism for conveying an optical pickup; Locking means to lock in and when tray ejection command is given,
Control means for controlling the pickup feed mechanism to move the optical pickup to a predetermined position, and means for unlocking by interfering with the optical pickup and the locking means moved to the predetermined position. I do.

Further, according to a third aspect of the present invention, there is provided a disk reproducing apparatus, comprising: a tray on which a disk is mounted and which can be taken in and out of the unit; a pickup feeding mechanism for conveying an optical pickup; Lock means for locking the optical pickup; a tray discharge command; a control means for controlling the pickup feed mechanism to move the optical pickup to a predetermined position on the outer peripheral side from the recording area of the disc; And means for unlocking the optical pickup by interfering with the locking means.

According to the present invention, the tray lock is released by the lock means by the power of the pickup feed mechanism, so that it is not necessary to separately provide a power source for releasing the tray lock. Reduction and cost reduction can be achieved.

As a more specific method for releasing the tray lock by the lock means by the power of the pickup feed mechanism, when a tray discharge command is given, the optical pickup is moved to a predetermined position and moved to the predetermined position. The lock is released by causing the optical pickup and the lock unit to interfere with each other.

More specifically, a system in which the tray lock is released when the optical pickup (light beam position) is moved to a predetermined position on the outer peripheral side from the recording area of the disk can be exemplified. .

According to a fourth aspect of the present invention, there is provided a disk reproducing apparatus according to any one of the first to third aspects, wherein the acceleration is applied by an externally applied acceleration in a predetermined direction. The apparatus further comprises means for moving in a direction substantially opposite to the direction, interfering with the locking means and preventing the unlocking operation.
According to the present invention, even if the optical pickup is moved to a position where the lock is released due to a fall of the device or an external impact, it is possible to prevent the lock of the lock unit from being released,
It is possible to realize a disk reproducing device having excellent reliability.

Further, according to a fifth aspect of the present invention, there is provided a disk reproducing apparatus comprising: a motor mounted on a chassis member; an optical pickup supported on the chassis member so as to be freely transported; A rack, at least one gear including a gear meshed with the rack, which is connected to the drive shaft of the motor, and biasing means for biasing the gear meshed with the rack against the rack. It is characterized by the following.

According to the present invention, the gear is pressed against the rack by the urging force of the urging means, so that the rattle between the gear and the rack is eliminated, the transmission of power becomes better, and when the tray lock is released. , It is possible to satisfactorily cope with the fluctuation of the pickup transport load.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are perspective views showing the structure of a main part including a tray lock mechanism and the like in a disk reproducing apparatus according to an embodiment of the present invention.

The structure of the main part including the tray lock mechanism of this embodiment is similar to that of the disk reproducing apparatus shown in FIG. 8, for example, in which the tray on which the disk is mounted is parallel to the cabinet or the unit which is the drive body. Applied to a disk playback device that can be inserted and removed (along the disk surface direction). 1 and 2, a mechanical base (not shown) which is tiltably provided for performing a disk clamping operation is provided in the same manner as the disk reproducing apparatus shown in FIG. The pickup chassis 2 shown in FIGS. 1 and 2 is mounted on the mechanical base via a buffer member such as a damper rubber.

The pickup chassis 2 is equipped with a disk motor 5 having a turntable 4 directly connected to a motor shaft. An optical pickup 7 is supported via a pair of guide shafts 6 so as to be able to be conveyed in the disk radial direction. I have. The pickup chassis 2 is provided with a pickup feed motor 8 and a power transmission mechanism for the motor 8.
The optical pickup 7 is provided with an ejection protrusion 9 for interfering with the lock lever 11 of the tray lock mechanism 10 disposed in the tray 21 and rotating the lock lever 11.

The lock lever 11 is rotatably supported by a shaft 12 fixed to the top plate of the tray 21. When the tray 21 is housed in the unit 1 and does not receive interference from the eject projection 9, the unit It interferes with the lock pin 13 protruding from the bottom plate 1 and functions to regulate the discharge movement of the tray 21. The lock lever 11 is connected to the other end of a lock spring 15 whose one end is supported by a stopper lever 14 having a weight (weight) described later. Due to the pulling force of the lock spring 15, the lock lever 11 is constantly urged in the direction of rotation opposite to the direction of rotation by the pressing from the eject projection 9,
The rotation position in the biasing direction is regulated by the biasing direction.

Further, as shown in FIG. 1, a spring receiving portion 18 for receiving one end of a torsion spring 22 attached to the upper surface of the tray 21 is formed on the top plate of the unit 1.
A spring receiving portion 23 for receiving the other end of the torsion spring 22 is formed on the upper surface of the tray 21. When the tray 21 is accommodated in the unit 1, the torsion spring 22 bends between the spring receiving portion 18 of the unit 1 and the spring receiving portion 23 of the tray 21. Is to be popped out.

FIG. 3 is an enlarged plan view showing the tray lock mechanism, and FIG. 4 is a partial sectional view of the tray lock mechanism.

FIG. 3A shows a tray locked state. When the tray 21 is stored in the unit 1, the lock lever 11 rotatably supported by a shaft 12 (see FIG. 4) provided on the top plate 21 a of the tray 21 so as to protrude downward is provided on the tray discharge side. The lock pin receiving portion 11a formed at the end of the unit 1 interferes with a lock pin 13 (see FIG. 4) provided to protrude upward from the bottom plate 1a of the unit 1, whereby the tray 21 Locked in place.

When the tray 21 is inserted, the lock pin 13 contacts the guide surface 11b of the lock lever 11 and presses the guide surface 11b, whereby the lock lever 11 rotates in the direction of arrow L and rotates to a predetermined angle. When the lock pin 11 is moved, the lock pin 13 and the guide surface 11b are disengaged from each other, and the lock lever 11 is turned by an arrow R
By rotating in the direction, it is received in the lock pin receiving portion 11a, and the lock of the tray 21 is achieved.

Next, the operation for releasing the tray lock will be described.

When the controller which controls the disc reproducing apparatus detects that the eject switch (not shown) is pressed, the controller changes the position of the light beam of the optical pickup 7 to the position of the disc as shown in FIG. The pickup feed mechanism is controlled to move to a fixed position set on the outer peripheral side of the recording area.

In accordance with the movement of the optical pickup 7, the eject projection 9 provided integrally with the optical pickup 7 moves toward the lock lever 11, and as shown in FIG. By contacting and pressing the lock lever 11, the lock lever 11 rotates a predetermined angle in the direction of the arrow L while opposing the urging force of the lock spring 15. As a result, the lock lever 11 is released from the interference state with the lock pin 13 and the tray lock is released, and the tray 21 is ejected forward from the unit 1 in the direction of arrow X by the force of the torsion spring 22.

As described above, the disk reproducing apparatus of the present embodiment moves the light beam position of the optical pickup 7 to a fixed position on the outer peripheral side of the recording area of the disk, and through the eject protrusion 9 attached to the optical pickup 7. The lock of the tray 21 is released by rotating the lock lever 11 to rotate the tray 21, that is, the lock of the tray 21 is released using the power of the pickup feed motor 8. For this reason, there is no need to separately provide a power source for releasing the tray lock.
Power consumption and cost can be reduced.

Next, the structure and operation of the stopper lever 14 having a weight will be described with reference to FIGS.

The stopper lever 14 is rotatably supported on a shaft 23 fixed to the tray 21. A weight 17 is attached to one end of the stopper lever 14, and an interference portion 24 with the lock lever 11 is provided at the other end. As shown in FIG. 3, the lock lever interference portion 24 enters the stopper lever entry portion 11c formed on the lock lever 11 and locks the rotation of the lock lever 11 when the tray 21 is locked and unlocked. It does not hinder.

The stopper lever 14 is in a state where a part of the lock lever interference portion 24 is constantly pressed against the curvature surface (curvature surface with respect to the center of the rotating shaft 12) 11d of the lock lever 11 by the urging force of the lock spring 15. Using the curvature surface 11d as a guide, the lock lever interference portion 24 can be smoothly inserted and removed from the stopper lever entry portion 11c.

The stopper lever 14 is moved from the position shown by the solid line in FIG. 5 to the position indicated by the solid line in FIG. And the lock lever interference portion 2 of the stopper lever 14
4 is separated from the curvature surface 11d of the lock lever 11.
Thus, the entry of the lock lever interference portion 24 into the stopper lever entry portion 11c is caused by the curvature surface 11 of the lock lever 11.
It is blocked by the lever intrusion regulating protrusion 11e provided at the position opposing d. Therefore, the rotation of the lock lever 11 when the optical pickup 7 is moved toward the outer periphery of the disk due to the drop of the apparatus or the impact from the outside is prevented by the stopper lever 14, so that the locking of the tray 21 is not intended. The disc player can be prevented from coming off, and a more reliable disk reproducing device can be realized.

Next, the details of the pickup feed mechanism will be described with reference to FIGS.

As shown in these figures, the pickup feed motor 8 is mounted on a motor bracket 33, and a plurality of motor hold ribs 32 are provided in a motor holding portion 31 provided on the pickup chassis 2 so that a side surface (curved surface) of the motor 8 is provided. Is held in the form of pressing locally.
A motor gear 34 is press-fitted into a motor shaft (not shown) of the pickup feed motor 8 protruding toward the optical pickup 7 through an opening (not shown) provided in the motor bracket 33. And a pickup feed gear 35 rotatably supported by the pickup gear. The rack 3 of the optical pickup 7 is provided in the small gear portion 35a of the pickup feed gear 35.
6 are engaged.

At one end of the motor bracket 33, there is provided a spring holding portion 39 in which a biasing spring 38 is fitted and held. The distal end of the biasing spring 38 externally fitted and held in the spring holding portion 39 is brought into sliding contact with the lower surface of the tray 21. That is, the biasing spring 38 is held in a compressed state between the motor bracket 33 and the tray 21, whereby the motor bracket 33 is moved in the direction of the arrow Y, that is, the pick-up gear The small gear portion 35a is biased in a rotational direction to press the small gear portion 35a against the rack 36.

As described above, the small gear portion 35a of the pickup feed gear 35 is moved to the rack 3 by the urging force of the urging spring 38.
6, the two gears 35a,
The rattling between the gears 36 is eliminated, the power transmission becomes better, and it is possible to easily cope with fluctuations in the pickup conveyance load such as when the tray lock is released. Also,
By providing the gear engagement urging structure on the side of the pickup chassis 2, the degree of freedom in setting the engagement play restriction force is increased.

In this embodiment, a coil spring is used as the biasing means, but a leaf spring may be used, or another elastic member may be used instead of the spring.

[0042]

As described above, according to the disk reproducing apparatus of the present invention, it is necessary to separately provide a power source for releasing the tray lock by releasing the tray lock by the lock means by the power of the pickup feed mechanism. Gone
It is possible to reduce the size, weight, power consumption, and cost of the entire device.

According to the present invention, even if the optical pickup is moved to the position where the lock is released due to the drop of the device or the impact from the outside, the lock of the lock means can be prevented from being released, and the reliability can be improved. Thus, a disk reproducing device having excellent characteristics can be realized.

Further, according to the present invention, since the gear is pressed against the rack by the urging force of the urging means, the rattling between the gear and the rack is eliminated, and the transmission of power is improved, and the tray lock is improved. It is possible to easily cope with a change in the pickup transport load at the time of release or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a main part including a tray lock mechanism and the like in a disk reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state after a tray lock is released in the disc reproducing apparatus of FIG. 1;

FIG. 3 is an enlarged plan view showing the tray lock mechanism of the embodiment.

FIG. 4 is a partial sectional view of the tray lock mechanism of FIG. 3;

FIG. 5 is a plan view for explaining the operation of a stopper lever with weight attached to the tray lock mechanism of the embodiment.

FIG. 6 is a perspective view showing details of a pickup feed mechanism of the disc reproducing apparatus of FIG. 1;

FIG. 7 is a sectional view of the pickup feeding mechanism of FIG. 6;

FIG. 8 is a diagram showing a conventional tray lock mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Unit 2 ... Pickup chassis 4 ... Turntable 5 ... Disc motor 7 ... Optical pickup 8 ... Pickup feed motor 9 ... Eject protrusion 10 ... Tray lock mechanism 11 ... Lock lever 13 ... Lock Pin 14 Stopper lever 15 Lock spring 16 Stopper pin 17 Weight 21 Tray 22 Torsion spring 33 Motor bracket 34 Motor gear 35 Pick-up feed gear 36 Rack 38 Biasing spring

Claims (6)

[Claims] 1. A tray on which a disc is mounted and which can be taken in and out of a unit, a pickup feeding mechanism for conveying an optical pickup, a lock means for locking the tray in the unit, and a power of the pickup feeding mechanism. Means for unlocking the locking means. 2. A tray on which a disc is mounted and which can be taken in and out of the unit, a pickup feeding mechanism for conveying an optical pickup, a lock means for locking the tray in the unit, and when a tray discharge command is given. Control means for controlling the pickup feed mechanism so as to move the optical pickup to a predetermined position; and means for unlocking the optical pickup moved to the predetermined position by interfering with the locking means. A disc reproducing apparatus characterized in that: 3. A tray on which a disk is mounted and which can be taken in and out of the unit, a pickup feeding mechanism for conveying an optical pickup, a lock means for locking the tray in the unit, and when a tray discharge command is given. Control means for controlling the pickup feed mechanism so as to move the optical pickup to a predetermined position on the outer peripheral side from the recording area of the disc; and causing the optical pickup moved to the predetermined position and the locking means to interfere with each other. A disk reproducing apparatus comprising: means for unlocking. 4. The disk reproducing apparatus according to claim 1, wherein the disk reproducing device moves in a direction substantially opposite to the acceleration direction by an externally applied acceleration in a predetermined direction and interferes with the locking means. A disk reproducing apparatus further comprising means for preventing an unlock operation. 5. A motor mounted on a chassis member, an optical pickup supported movably on the chassis member, a rack fixed to the optical pickup, and a drive shaft of the motor connected to the rack. A disc reproducing apparatus comprising: one or more gears including a meshed gear; and urging means for urging the gear meshed with the rack to press against the rack. 6. A motor mounted on a chassis member, an optical pickup supported movably on the chassis member, a rack fixed to the optical pickup, and a drive shaft of the motor connected to the rack. One or more gears including a meshed gear; a gear rotatably supporting the gear meshed with the rack; and a gear supported by the chassis member so as to be movable in a direction in which the gear is brought into and out of contact with the rack. A disk reproducing apparatus comprising: a support member; and a biasing unit that biases the gear support member so that a gear meshed with the rack is pressed against the rack.